Data from the Nielsen Company shows that the average smartphone user used 298MB of data throughout the first three months of 2010, but that's an average. As the FierceWireless news site points out, the vast majority of smartphone users aren't really using their unlimited data, and would likely benefit from tiered pricing. It's about 6 percent of the market that uses up more than half the data consumed, and wireless carriers might actually lose out if the masses switched over. There's a lot more interesting data pull-outs in the full post, including the point that more than a third of smartphone owners have no data plan at all, having bought their device before such plans were mandatory. Have you done any measurements or calculations on how your own data usage fits into a tiered vs. unlimited plan? [FierceWireless via Boy Genius Report]